Valve



Apri121,1925. u 1,534,260

. H. FELDBUSH ET AL VALVE Filed my a, 11922 Patented pr. 21, 1925.

UNITED STATES..

PATENT oFFics.

HARRY FELDBUSH AND HERMAN MILLER, CINCINNAJTL OHIO, ASSIGNORS TO' WORTHINGTON PUMP AND'MACHINERY CORPORATION, 'OF NEW YORK, N. Y., A

CORPORATION OF VIRGINIA..

Application med July 5,

This i verition relates tp automaticrplate valves of vhe general class that function by bending substantially uniformly throughout I their-length, one'forin 0f suoli valve'being shown in'United StatesLetters Patent No. 13,991, reissued Octoberl 12, 1915;- No. 1,341,145, dated May '25, `1920, and No. 1,413,059, dated Aprilf18, 1922, in which the valve functions by( bending, the special object ofthe present invention being to pro' The improved valve is of general applica-v tion, but ywill be found of particular value in low pressure work, or "in connection with long pressure lines where, due Ato the'surge 'of the moving medium, the valve plates or, strips are frequently thrown against the valve guard with more than usual force, with consequent danger oflbreakage of the; plates.. v

Briefly stated, the invention contemplates the use,l of aplurality of valve st'rips arranged -in superpo'sed relation over the valve port or ports. The rear plate thus acts as a.,

bufer to cushion theiinpact of the valve strip against 'the guard' and damage f or breakage is less than with a single strip. The strips, also, may each be made of less thickness than with a single strip, so that the valve Will-open under aconsiderably less load than would be required witha single strip, due to the fact that the pressure required to bend such strips varies in accordance with the cube of their thickness, and thus the valve isgbetter adapted for low pressure work. Moreover, as the fibre stresses in the metal strips vary directly in accordance with the square of their thickness, such stresses in the thinner valve strips will be less than withasingle plate of stand# ard thickness, and the valve, therefore, has the advantage, for low pressure work, that higher lifts will be obtained before the metal VALVE.

1922. l semi No. 572,861.9.

is stressed as mu'ch as with a single plate or strip`=used under similar conditions. f

For a full under-standing of the invention,

a detailed description of a construction embodying the same in a preferred form .vill

nowbe given, in connection with the action;

Figure 2\is a longitudinal section of the valve,'wit`h a portion of the cap broken away to sliow--on'e'of the Jorts in the cap;

Figure '3 is a section on the line 3--3 of Fi rs. l and 2, andl Referring'noiv to the drawings, and particularly to Fig. 1, '10 indicates the valve seat, shown as of circular form and having a plurality of straight ports l, each of. which is controlled by a plurality of valve plates or strips 2, 3 in superposed/relation, which, in the construction shown, are arranged to'o'pen against'the cap or guard 11, the latter being shown as having a series, of

ports/1 out of line with-the Valve strips. f

In theconstruction shown,'as in Patent No. 1,341,145, the valve strips 2, 3 are held in! 'position and guidedwithout the provision of any recesses or projections on the rvalve seat 10, the latter thus being formed and finished. asr a plain surface co-acting Wi-th the valves in their closed position, this being the preferred construction. 'Such strips 2, 3 are held in position against sideiigurell is a view similar to Fig. 2, with` 4the valve open. vide an improvedvalve of! this general type.

Wise 'movement and guided in their opening and .closing-'movements by recesses 5 in the cap,.which receive the ends of the superposed strips 2, 3, these recesses having inclined or curved walls on the side toward which the valves open, so as to permit the latter to bend freely in the opening move- `nient, and the side Walls, 6, of the recesses,

act to;hold the strips or plates 2, 3 in position sidewise in line with the ports 1. The strips 2, 3 are advantageously .made of slightly .different lengths, but of the same width, thetop strip 2 being the shorter of i the strips. The top strips may be' somewhat be provided the same relative recesses 5', due to the contour of the Walls thinner or thicker than the strip next to the valve seat, or of the same thickness. The strips or plates, also, are preferably rounded 'at their ends,. asfindicated at 7 to eliminate as far as possible Wear which might occurv with a sharp angle at such points. By making the top strips 2 slightly shorter than the lower strips, there Lwill of the guardi/with consequen equal freedom of movement of such strips at their ends as is the case With the lower strips.

The construction of the valve Will be clear from the foregoing, and the operation thereof Will noW be briefly described as follows: In the normal positions of the parts, the -valve strips 2, 3 are intended to lie Hat on the valve seat 10 above the ports l, as shown ink Figs.. 2 and 3, and the opening movementv of the'strips is limited by the abutment surface o f the cap 11.

It will be understood that theinvention may be employed in valve constructions of other' ,form than that'shown, and that various changes and modifications may be made in the form and mounting of the valve plates or strips While retaining tlie'inven.-

tionA defined by the clainisr What is claimed ist A 1. The combination .with a valve seat having one-or more ports, of a plurality of thin elastic valve plates arranged in superposed space in the relation to each other over said port or ports and lmounted to bend uniformly in function-4 ing.

2.l The combination with a valve seat having one or more ports, of a plurality of thin elastic valve plates arrangedl insuperposed relation to each other .over said port or ports and mounted to bend uniformly in functioning, and an abutment for said plates.

3. The combination With a valve seat having one .or more ports, of a plurality of thin elastic valve plates arranged in superpcosed' relation to each other over said port or ports and mounted to bend uniformly in functioning, means at opposite ^nds of the valve for holding said valve plates in position and permitting bending thereof, and an abutment for said plates. l

4. The combination with a valve seat having a plain surface, of a plurality of elongated plates of elastic material arranged in superposed relation to each other and normally closing the port or ports and mounted to bend uniformly in functioning, and a cap provided with means at opposite e ds of the valve for holding said plates in position and curved to form Van abutment for the plates. t

In testimony Whereo.f,We have hereunto .set our hands. 

